高性能磷酸锰锂-磷酸钒锂复合正极材料研究进展  

Research Progress in high Performance LiMnPO_(4)-Li_(3)V_(2)(PO_(4))_(3) Composite Cathode Materials

作　　者：周琦 周恒为 蒋小康 Zhou Qi;Zhou Hengwei;Jiang Xiaokang(Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics,College of Physical Science and Technology,Yili Normal University,Yining,Xinjiang 835000,China)

机构地区：[1]伊犁师范大学物理科学与技术学院,新疆凝聚态相变与微结构实验室,新疆伊宁835000

出　　处：《伊犁师范学院学报（自然科学版）》2021年第1期31-36,共6页Journal of Yili Normal University：Natural Science Edition

基　　金：新疆维吾尔自治区高校科研计划项目(XJEDU2017S049).

摘　　要：橄榄石结构的磷酸锰锂(LiMnPO_(4))作为一种高能量密度、高工作电压的正极材料引起研究者们的广泛研究.但是在室温下,LiMnPO_(4)的电子电导率(<10^(-10)S/cm)和离子迁移率都很低,导致了较差的电化学性能.单斜相的磷酸钒锂(Li_(3)V_(2)(PO_(4))_(3))具有一种开放的三维网络骨架结构,导致锂离子的扩散速度远快于LiMnPO_(4).磷酸锰锂-磷酸钒锂复合材料兼具两种材料的优势,是一种高性能的锂离子正极材料.综述了近几年来磷酸锰锂-磷酸钒锂复合正极材料在制备方法、材料改性等方面取得的进展,并对后续研究工作进行展望.The olivine-structured LiMnPO_(4),as a high energy density and voltage cathode material for lithium batteries,has been extensively studied.Nevertheless,LiMnPO_(4)suffers very poor electronic conductivity(10-10 S/cm)and lithium ion diffusion kinetics at room temperature,which make it difficult to obtain a proper electrochemical activity.Compared with LiMnPO_(4),the monoclinic Li3V2(PO_(4))3 displays much faster lithium ion diffusion speed due to its open three-dimensional framework.Hybrid cathode materials of LiMnPO_(4)and Li_(3)V_(2)(PO_(4))_(3)show excellent performance for integrating the advantages of LiMnPO_(4)and Li3V2(PO_(4))_(3).The research progress in preparation methods and modification of LiMnPO_(4)-Li_(3)V2(PO_(4))_(3)composite cathode materials in recent years was reviewed.In addition,the future research work is proposed.

关 键 词：高能量密度 锂电池 磷酸锰锂-磷酸钒锂复合正极材料 

分 类 号：O482.31[理学—固体物理]